1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
|
/* $OpenBSD: simpleamp.c,v 1.4 2022/04/06 18:59:28 naddy Exp $ */
/*
* Copyright (c) 2020 Patrick Wildt <patrick@blueri.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <machine/fdt.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/ofw_regulator.h>
#include <sys/audioio.h>
#include <dev/audio_if.h>
#include <dev/midi_if.h>
int simpleamp_match(struct device *, void *, void *);
void simpleamp_attach(struct device *, struct device *, void *);
int simpleamp_open(void *, int);
void simpleamp_close(void *);
struct simpleamp_softc {
struct device sc_dev;
struct dai_device sc_dai;
uint32_t *sc_gpio;
int sc_gpiolen;
uint32_t sc_vcc;
};
const struct audio_hw_if simpleamp_hw_if = {
.open = simpleamp_open,
.close = simpleamp_close,
};
const struct cfattach simpleamp_ca = {
sizeof(struct simpleamp_softc), simpleamp_match, simpleamp_attach
};
struct cfdriver simpleamp_cd = {
NULL, "simpleamp", DV_DULL
};
int
simpleamp_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "simple-audio-amplifier");
}
void
simpleamp_attach(struct device *parent, struct device *self, void *aux)
{
struct simpleamp_softc *sc = (struct simpleamp_softc *)self;
struct fdt_attach_args *faa = aux;
sc->sc_gpiolen = OF_getproplen(faa->fa_node, "enable-gpios");
if (sc->sc_gpiolen > 0) {
sc->sc_gpio = malloc(sc->sc_gpiolen, M_DEVBUF, M_WAITOK);
OF_getpropintarray(faa->fa_node, "enable-gpios",
sc->sc_gpio, sc->sc_gpiolen);
gpio_controller_config_pin(sc->sc_gpio, GPIO_CONFIG_OUTPUT);
}
sc->sc_vcc = OF_getpropint(faa->fa_node, "VCC-supply", 0);
printf("\n");
sc->sc_dai.dd_node = faa->fa_node;
sc->sc_dai.dd_cookie = sc;
sc->sc_dai.dd_hw_if = &simpleamp_hw_if;
dai_register(&sc->sc_dai);
}
int
simpleamp_open(void *cookie, int flags)
{
struct simpleamp_softc *sc = cookie;
if (sc->sc_gpio)
gpio_controller_set_pin(sc->sc_gpio, 1);
if (sc->sc_vcc)
regulator_enable(sc->sc_vcc);
return 0;
}
void
simpleamp_close(void *cookie)
{
struct simpleamp_softc *sc = cookie;
if (sc->sc_gpio)
gpio_controller_set_pin(sc->sc_gpio, 0);
if (sc->sc_vcc)
regulator_disable(sc->sc_vcc);
}
|
